Attached Link: http://www.derby-vi-service.demon.co.uk/pictures.htm

You can see some saturn rings at my site by following the link. They are towards the bottom of the page. Use an alpha plain, a torus is too thick, the rings are very thin. These rings are generated from Nasa data. I have data for transparency and reflectivity. The pictures, unfinished, currently only have transparency data applied, plus a little bit of procedural noise. The maps are applied to an alpha plain. The original data is in the form of a string of numbers, giving values across the rings. These are used to form a greyscale 'strip', which I then turned into rings of the right proportions in Corel Draw. I also had a go at purely procedural rings a few months ago, but I can't get at the image from where I am sitting, though there is an early vesion on my site. These procedural rings us a boolean operation to create the hole in the middle. Hope this helps.